package com.atguigu.gulimall.product.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {

//    @Autowired
//    CategoryDao categoryDao;
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {
        //1.查出所有的分类
        List<CategoryEntity> entities = baseMapper.selectList(null);//查询所有


        //2.组装成父子的树形结构
    //2.1找到所有类的一级分类

        //entities.stream().filter();

//       List<CategoryEntity> leve1Menus = entities.stream().filter((CategoryEntity)->{
//        return  CategoryEntity.getParentCid()==0;
//        }).collect(Collectors.toList());
        List<CategoryEntity> leve1Menus = entities.stream().filter(CategoryEntity ->
            CategoryEntity.getParentCid() == 0
        ).map((menu)->{
            menu.setChildren(getChildren(menu,entities));
            return menu;
        }).sorted((menu1,menu2)->{
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());

        return leve1Menus;
    }

    /**
     * 删除所有
     * @param asList
     */
    @Override
    public void removeMenuByIds(List<Long> asList) {
        //todo 1.检查当前删除的菜单 是否被其他的地方引用
        //0  不显示  删除   1 显示 不删除


        //删除放进去的 所有的id
        baseMapper.deleteBatchIds(asList);
    }

    private List<CategoryEntity> getChildren(CategoryEntity root,List<CategoryEntity> all){

            List<CategoryEntity> collect = all.stream().filter(categoryEntity -> {
                return categoryEntity.getParentCid() == root.getCatId();
            }).map(categoryEntity -> {
                categoryEntity.setChildren(getChildren(categoryEntity, all));
                return categoryEntity;
            }).sorted((menu1, menu2) -> {
                return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
            }).collect(Collectors.toList());


            return collect;
        }








//    public static void main(String[] args) {
////        List<CategoryEntity> leve1Menus = entities.stream().filter((CategoryEntity)->{
//////        return  CategoryEntity.getParentCid()==0;
//////        }).collect(Collectors.toList());
//        List<String> list = Arrays.asList("zhangsan", "lisi", "wangwu", "zaza");
//
//        List<String> zlist = list.stream().filter((str) -> {
//            return str.startsWith("z");
//        }).collect(Collectors.toList());
//
//        zlist.forEach(li->{
//            System.out.println("ssss==="+li);
//        });
//
//    }



}